Fuel Efficiency
I can confirm Tiltrider's estimates are spot on. I have an '89 Jefferson 42 Sundeck. It has a semiplaning hull with LOD of 42 ft, LOA of 45 ft, LaW of 37.7 ft, beam of 14' 3", draft of 3' 10" and weight of 30,000 lb. Power comes from twin Cat turbo 3208's making 260 HP each...